Safety-gate.



To all it maytconcmq UNITED STATES PATENT OFFICE.

or GHICAGO, ILLINOIS;

SAFETY-GATE.

Patented Dee. 2'7, 1910.

Application filed November 22 1909. Serial No. 529388.

Be it known that I, Gnoncn R. FREAK, a

citizen of the United States, and a resident I ,t'ance when it. will be stopped by the auto-' maticfl break of the circuit in which said of Chicago, in the county ofCoolg and State of Illinois, have invented certain new and useful Improvements in Safety-Gates, of:

which the following, w-l en-takenjn connection with the drawingsaccompanying and forinin a part hereof,.is"a full and c0mplete escription, sufficient to enable'j'those skilled inthe art to which it perta'insrto understand, make, and use the same. .This "invention relates to gates -,open said roadway. And the object of the invention is to obtain a safety gate -which 'will strong and du rable,.s1mple in construction, not liable to'get out pf order,

which will be operated by'an electric nioton 'lliOIl the closing of an'electric switch, and w ich when started in a given direction (as .to open or to close), will continue to move in said direction over the determined dis motor is an element.

. In thedrawings referred Figures -1, 2, 3 and 4, are diagrammatic views of the several electric circuitsof adevice embodying.

my'invention; Fig. 5 is an elevation of a safety ,gate comprlsing this invention, said gatebeing down. :Fig. 6 is atopplan view of'a safety gate embodyingthe' invention,

' said gate eingdow'n; Fig. 7 is an-elevation of the faoeo'f oneof the posts of the gate, which, face is e rov'ided' with electric electrically connected to said conductors.

.Fig. 8 is anz,ele vation of a -standardv or hanger'pmvidcd withjournalbearings, and

She

conductors, showi'ngt e terminals which are s rtitat ablggg; moiintedtherein, with a worm andgeariwheelson said shafts. Fig.

" 9 is an elevationgof the standard or hanger illustratedjn Figrsandiof the shaft worm Fig. '10 is apo nt' switch or mng an element in the oonand gear wheels .,,-mpuiit ed in said standard I orhan enviswedfitarian'gl'e otQO-de rees from t c View thereofgillilstrated in Fig. 8. erspectisze of a double three strguction comprising-this invention. Fi s.

' 7 to "10 inclusive are drawn to a larger sea a,

. designed to be opened and closed at the will of an: 0 erator, to'perrnit and prevent travel upon.

, of the posts ,E, and

are electric conductors which are attached in bearings j.

and in Figs. 5 and 6 the electric connections are drawn to a larger. scale than are the remainder of said'figures'.

In Figs. 5 and 6 a safety gate. embodying this invention isillustrated as the same is constructed across a roadway provided with a draw bridge, said construction bein shown as erected on the abutment at one en,

of the bridge, the bridge itself not being shown. Like gates are erected on the opposite .abntmen ts. i

A reference letter used to desi nate II given part is applied to said art t roughout the several figures 'of tiedrawings, wherever the same appears.

Ais a roadway.

a, a, are fpot ,walks on the side of the roadway; D I

B, 'Bfare abutmentsto the bridge. C, are gates which are vertically mova e.

across the hpperedg'e of gates C, C' These grooyesform tracks .connecting 'the tracks on the roadway A withlike tracks on the bridge.

' The'gatesO, O, are provided: onone side thereof and at .the ends, withthe posts E, E. These posts extend below. the ate, and wells are provided therefor as in icated by the broken lines lettered F,"F, Fig.5

G, G, are ear racks agtfrched to onefaoe i 8 1 to one face of the posts E, E, respectively.

J, J, are hangers'or standards.-

GEORG E'R. FREAK, OF'GHIOAGO, ILLINOIS, ASSIGNOB 0F ONE-HALF 'IO JOHN ROBERTS j, j", are journal bearings, in standardsior hangers J.

'K is a shaft rotatably mouhted hear-'- ings 7' and K is a shaftrotatably mounted L, L, are n nions or small ear wheels rigidly secured. to shaft K a'n inesh'withi; the teeth on theracks G, G. l, I are worm gedrwheels which are also rigidly secured to shaft K. I y,

Z, I, are worms which are rigidly secured tos'hafts K, K'-. r M, M, are electric motors which. -a1;e

mounted to turn shaft K in the directionin which the L -Qmr is turning.' 1

N, N, and it, n, are ro lers whiclr forni electric terminals. The-rolls -N N5 ister with and travel on ee trac - 75 v D, D, are grooves which'extend laterally the rollers 11, n, register with and travel on track I.

I, p, are wires which extend from one of the field terminals of the motor M to the respective terminals N, n; and P, p, are wires extending from terminals N, n, to terminals u, t, of switch S.

Q is a wire extending from the other teriuinal of the field motor M.

g, g, are wires from the brushes of the armature of the motor M to U and T.

The wires 79', p, Q, g, g, may be contained in a cable and extend. to the terminal of the switch S which switch may be located at any convenient place as on a bridge or to the signal house of the gate keeper.

T, t, .t, U, u, u, are terminals of ,switches S.

T, U, are terminals of switch S.

It will be observed that the wire P extends from motor M to terminal N and that so long as terminals N, N, are both in electric contact with electric conductor H,--the' circuit of which said parts are elements is closed by the closing of the switch S. A current flowing from the source of electric supply to terminals t of the switch, S flows over wire g to one brush of the armature thence through the armature, thence over wire q; to terminal U, thence over the switch to terminal .11., thence over wire P to terminal N, thence over wire P 'to a field terminal of the motor, through the field and' ;over wire Q to ground. The current flowing over the last above described circuit rotates said motor M to raise the ate; As the gate rises to its extreme upwar position the roller forming terminal N will move beyond the. end of the conductor H and will break the circuit. The gate is thus automatically stoppechat its. determined extreme upward position. .Thiscircuit is shown with the switches closed by the diagram in Fig.1.,

It will be observed on reference to Fig. ,7

that conductor H extends beyond the end ofconductor I and that when the gate is in its extreme downward position the rollers or terminals N, N, are both in contact with the conductor H and by closing the switch S as illustrated in Fig. 1 of the drawings a current will pass through the field of motor M in a direction moving the motor direction required to raise the gate. ll

V',-V, V are branch wires from source of electrical supply to terminals of switch S. When the gateis in its-Iextreme u ward position the terminal N. will move 0' conduct'or' H a suflieient distanceto open or.

' break the circuit and the gate will be automatically stopped in its determined extreme I upward position. 'At this timelthe rollers through. the switch to terminal T thence minal N, thence overconductor H to ter-' in the 12, n, are both in electrical contact with electrical conductor I and by moving the switches into the position illustrated in Fig. 3 the gate will again be lowered.

Switch S may be termed an emergency switch'and is only used when for any reason it is desired to give the gate a further forward (either up or down) movement, after it hasbeen automatically stopped, as before described.

The circuits which are made by the closing of the switch S are illustrated in Figs. 2 and 4 of the drawings.

Any number of gates may be set on the roadway to a bridge or crossing, which is desired. I have shown two on the abutment at one end of a bridge and each is provided with independent circuits and means by which they may be moved independently. The gate on the side of the roadleading onto the bridge usually being closed before the gate is closed on the other side of the' road, from the bridge. s

I have illustrated the gate embodying my invention constructed to be raised to close the roadway, but of course the guides .to the gate may be constructed so that the gate is raised to open the roadway and lowered to close it, but the construction of said guide ways forms no part qi' my invention.

Having thus described my invent-ion and operation thereofwhat- I claim as new and desire to secure by Letters Patent is 1. A movable gate, an electric motor,.

yond the other in one direction and said.-

other track extending beyond thefirst named one in the other direct-ion, electric terminals registering with said tracks, and said tracks movable on said terminals, 'a plurality of electric conductors respectively connected to said terminals, to motor circuits and. to switch terminals, so that when two of said terminals are in electric-"connection with one' of said tracks and a corresponding switch is closed, a motor circuit is closed.

2. A vertically movable gate, geared racks connected to the gate to .move therewith, rotatably mounted geared pinions meshin with said racks, an electric motor e'onnecte to said pinions to rotate the pinions in a direction corresponding with the direction "of rotation of the shaft of the motor",

switches, electric conductors from the motor to said switches, a. plurality of electric conductors on said gates, one of said conductors extending upward beyond the other, and said'otherconductor extending downward beyond the first named one, electric terminals registering with and on which said conductors move, a plurality of additional electric conductors respectively connected to Said terminals, to motor circuits and to switch terminals so that/when two of said terminals are in electric connection with one of saiclconcluctors 011 saicl gate and a corresponding switch is closed, a motor circuitis closed.

GEORGE R. FREAK, In the presence of CHARLES TURNER BROWN,

JOHX ROBERTS. 

